public TreeViewItemContainerData LastDescendant(
VirtualizingTreeView treeView)
{
if (!this.HasChildren(treeView))
{
return((TreeViewItemContainerData)null);
}
int siblingIndex = treeView.IndexOf(this.Item);
TreeViewItemContainerData itemContainerData1 = (TreeViewItemContainerData)null;
while (true)
{
++siblingIndex;
TreeViewItemContainerData itemContainerData2 = (TreeViewItemContainerData)treeView.GetItemContainerData(siblingIndex);
if (itemContainerData2 != null && itemContainerData2.IsDescendantOf(this))
{
itemContainerData1 = itemContainerData2;
}
else
{
break;
}
}
return(itemContainerData1);
}
/// <summary>
/// Get Next Child Of TreeViewItem
/// </summary>
/// <param name="currentChild"></param>
/// <returns>next treeview item after current child</returns>
public TreeViewItemContainerData NextChild(VirtualizingTreeView treeView, TreeViewItemContainerData currentChild)
{
if (currentChild == null)
{
throw new ArgumentNullException("currentChild");
}
int siblingIndex = treeView.IndexOf(currentChild.Item);
siblingIndex++;
TreeViewItemContainerData nextChild = (TreeViewItemContainerData)treeView.GetItemContainerData(siblingIndex);
while (nextChild != null && nextChild.IsDescendantOf(this))
{
if (nextChild.Parent == this)
{
return(nextChild);
}
siblingIndex++;
nextChild = (TreeViewItemContainerData)treeView.GetItemContainerData(siblingIndex);
}
return(null);
}
public TreeViewItemContainerData LastChild(
VirtualizingTreeView treeView)
{
if (!this.HasChildren(treeView))
{
return((TreeViewItemContainerData)null);
}
int siblingIndex = treeView.IndexOf(this.Item);
TreeViewItemContainerData itemContainerData1 = (TreeViewItemContainerData)null;
while (true)
{
TreeViewItemContainerData itemContainerData2;
do
{
++siblingIndex;
itemContainerData2 = (TreeViewItemContainerData)treeView.GetItemContainerData(siblingIndex);
if (itemContainerData2 == null || !itemContainerData2.IsDescendantOf(this))
{
return(itemContainerData1);
}
}while (itemContainerData2.Parent != this);
itemContainerData1 = itemContainerData2;
}
}
/// <summary>
/// Get Last Child of TreeViewItem
/// </summary>
/// <returns>Last Child</returns>
public TreeViewItemContainerData LastChild(VirtualizingTreeView treeView)
{
if (!HasChildren(treeView))
{
return(null);
}
int siblingIndex = treeView.IndexOf(Item);
TreeViewItemContainerData lastChild = null;
while (true)
{
siblingIndex++;
TreeViewItemContainerData child = (TreeViewItemContainerData)treeView.GetItemContainerData(siblingIndex);
if (child == null || !child.IsDescendantOf(this))
{
return(lastChild);
}
if (child.Parent == this)
{
lastChild = child;
}
}
}
public static void ExpandAll <T>(
this VirtualizingTreeView treeView,
T item,
Func <T, T> getParent,
Func <T, IEnumerable> getChildren)
{
treeView.ExpandTo <T>(getParent(item), getParent);
treeView.ExpandChildren <T>(item, getChildren);
}
public bool HasChildren(VirtualizingTreeView treeView)
{
if (Object.op_Equality((Object)treeView, (Object)null))
{
return(false);
}
int num = treeView.IndexOf(this.Item);
TreeViewItemContainerData itemContainerData = (TreeViewItemContainerData)treeView.GetItemContainerData(num + 1);
return(itemContainerData != null && itemContainerData.Parent == this);
}
public TreeViewItemContainerData FirstChild(
VirtualizingTreeView treeView)
{
if (!this.HasChildren(treeView))
{
return((TreeViewItemContainerData)null);
}
int siblingIndex = treeView.IndexOf(this.Item) + 1;
return((TreeViewItemContainerData)treeView.GetItemContainerData(siblingIndex));
}
/// <summary>
/// Returns true if TreeViewItem has children. DO NOT USE THIS PROPERTY DURING DRAG&DROP OPERATION
/// </summary>
public bool HasChildren(VirtualizingTreeView treeView)
{
if (treeView == null)
{
return(false);
}
int index = treeView.IndexOf(Item);
TreeViewItemContainerData nextItem = (TreeViewItemContainerData)treeView.GetItemContainerData(index + 1);
return(nextItem != null && nextItem.Parent == this);
}
public static void ExpandChildren <T>(this VirtualizingTreeView treeView, T item, Func <T, IEnumerable> getChildren)
{
IEnumerable children = getChildren(item);
if (children != null)
{
treeView.Expand(item);
foreach (T child in children)
{
treeView.ExpandChildren(child, getChildren);
}
}
}
public static void ExpandChildren <T>(
this VirtualizingTreeView treeView,
T item,
Func <T, IEnumerable> getChildren)
{
IEnumerable enumerable = getChildren(item);
if (enumerable == null)
{
return;
}
treeView.Expand((object)item);
foreach (T obj in enumerable)
{
treeView.ExpandChildren <T>(obj, getChildren);
}
}
/// <summary>
/// Get First Child of TreeViewItem
/// </summary>
/// <returns>First Child</returns>
public TreeViewItemContainerData FirstChild(VirtualizingTreeView treeView)
{
if (!HasChildren(treeView))
{
return(null);
}
int siblingIndex = treeView.IndexOf(Item);
siblingIndex++;
TreeViewItemContainerData child = (TreeViewItemContainerData)treeView.GetItemContainerData(siblingIndex);
Debug.Assert(child != null && child.Parent == this);
return(child);
}
public static void ExpandTo <T>(this VirtualizingTreeView treeView, T item, Func <T, T> getParent)
{
if (item == null)
{
return;
}
ItemContainerData containerData = treeView.GetItemContainerData(item);
if (containerData == null)
{
treeView.ExpandTo(getParent(item), getParent);
treeView.Expand(item);
}
else
{
treeView.Expand(item);
}
}
public static void ExpandTo <T>(
this VirtualizingTreeView treeView,
T item,
Func <T, T> getParent)
{
if ((object)item == null)
{
return;
}
if (treeView.GetItemContainerData((object)item) == null)
{
treeView.ExpandTo <T>(getParent(item), getParent);
treeView.Expand((object)item);
}
else
{
treeView.Expand((object)item);
}
}
protected override void AwakeOverride()
{
base.AwakeOverride();
this.m_treeView = (VirtualizingTreeView)((Component)this).GetComponentInParent <VirtualizingTreeView>();
this.m_siblingGraphicsRectTransform = (RectTransform)this.SiblingGraphics.GetComponent <RectTransform>();
RectTransform transform = (RectTransform)((Component)this).get_transform();
VirtualizingScrollRect componentInChildren = (VirtualizingScrollRect)((Component)this.m_treeView).GetComponentInChildren <VirtualizingScrollRect>();
if (Object.op_Inequality((Object)componentInChildren, (Object)null) && componentInChildren.UseGrid)
{
this.m_useGrid = true;
transform.set_anchorMin(Vector2.get_zero());
transform.set_anchorMax(Vector2.get_zero());
}
else
{
transform.set_anchorMin(Vector2.get_zero());
transform.set_anchorMax(new Vector2(1f, 0.0f));
}
}
public TreeViewItemContainerData NextChild(
VirtualizingTreeView treeView,
TreeViewItemContainerData currentChild)
{
if (currentChild == null)
{
throw new ArgumentNullException(nameof(currentChild));
}
int siblingIndex = treeView.IndexOf(currentChild.Item) + 1;
for (TreeViewItemContainerData itemContainerData = (TreeViewItemContainerData)treeView.GetItemContainerData(siblingIndex); itemContainerData != null && itemContainerData.IsDescendantOf(this); itemContainerData = (TreeViewItemContainerData)treeView.GetItemContainerData(siblingIndex))
{
if (itemContainerData.Parent == this)
{
return(itemContainerData);
}
++siblingIndex;
}
return((TreeViewItemContainerData)null);
}
protected override void AwakeOverride()
{
base.AwakeOverride();
m_treeView = GetComponentInParent <VirtualizingTreeView>();
m_siblingGraphicsRectTransform = SiblingGraphics.GetComponent <RectTransform>();
RectTransform rectTransform = (RectTransform)transform;
VirtualizingScrollRect scrollRect = m_treeView.GetComponentInChildren <VirtualizingScrollRect>();
if (scrollRect != null && scrollRect.UseGrid)
{
m_useGrid = true;
rectTransform.anchorMin = Vector2.zero;
rectTransform.anchorMax = Vector2.zero;
}
else
{
rectTransform.anchorMin = Vector2.zero;
rectTransform.anchorMax = new Vector2(1, 0);
}
}
public static void ItemDropStdHandler <T>(
this VirtualizingTreeView treeView,
ItemDropArgs e,
Func <T, T> getParent,
Action <T, T> setParent,
Func <T, T, int> indexOfChild,
Action <T, T> removeChild,
Action <T, T, int> insertChild)
where T : class
{
T dropTarget = (T)e.DropTarget;
if (e.Action == ItemDropAction.SetLastChild)
{
for (int index = 0; index < e.DragItems.Length; ++index)
{
T dragItem = (T)e.DragItems[index];
removeChild(dragItem, getParent(dragItem));
setParent(dragItem, dropTarget);
insertChild(dragItem, getParent(dragItem), 0);
}
}
else if (e.Action == ItemDropAction.SetNextSibling)
{
for (int index = e.DragItems.Length - 1; index >= 0; --index)
{
T dragItem = (T)e.DragItems[index];
int num1 = indexOfChild(dropTarget, getParent(dropTarget));
if ((object)getParent(dragItem) != (object)getParent(dropTarget))
{
removeChild(dragItem, getParent(dragItem));
setParent(dragItem, getParent(dropTarget));
insertChild(dragItem, getParent(dragItem), num1 + 1);
}
else
{
int num2 = indexOfChild(dragItem, getParent(dragItem));
if (num1 < num2)
{
removeChild(dragItem, getParent(dragItem));
insertChild(dragItem, getParent(dragItem), num1 + 1);
}
else
{
removeChild(dragItem, getParent(dragItem));
insertChild(dragItem, getParent(dragItem), num1);
}
}
}
}
else
{
if (e.Action != ItemDropAction.SetPrevSibling)
{
return;
}
for (int index = 0; index < e.DragItems.Length; ++index)
{
T dragItem = (T)e.DragItems[index];
if ((object)getParent(dragItem) != (object)getParent(dropTarget))
{
removeChild(dragItem, getParent(dragItem));
setParent(dragItem, getParent(dropTarget));
insertChild(dragItem, getParent(dragItem), 0);
}
int num1 = indexOfChild(dropTarget, getParent(dropTarget));
int num2 = indexOfChild(dragItem, getParent(dragItem));
if (num1 > num2)
{
removeChild(dragItem, getParent(dragItem));
insertChild(dragItem, getParent(dragItem), num1 - 1);
}
else
{
removeChild(dragItem, getParent(dragItem));
insertChild(dragItem, getParent(dragItem), num1);
}
}
}
}
protected override void AwakeOverride()
{
base.AwakeOverride();
m_treeView = GetComponentInParent <VirtualizingTreeView>();
m_siblingGraphicsRectTransform = SiblingGraphics.GetComponent <RectTransform>();
}
public static void ItemDropStdHandler <T>(this VirtualizingTreeView treeView, ItemDropArgs e,
Func <T, T> getParent,
Action <T, T> setParent,
Func <T, T, int> indexOfChild,
Action <T, T> removeChild,
Action <T, T, int> insertChild,
Action <T, T> addChild = null) where T : class
{
T dropTarget = (T)e.DropTarget;
//Set drag items as children of drop target
if (e.Action == ItemDropAction.SetLastChild)
{
for (int i = 0; i < e.DragItems.Length; ++i)
{
T dragItem = (T)e.DragItems[i];
removeChild(dragItem, getParent(dragItem));
setParent(dragItem, dropTarget);
if (addChild != null)
{
addChild(dragItem, getParent(dragItem));
}
else
{
insertChild(dragItem, getParent(dragItem), 0);
}
}
}
//Put drag items next to drop target
else if (e.Action == ItemDropAction.SetNextSibling)
{
for (int i = e.DragItems.Length - 1; i >= 0; --i)
{
T dragItem = (T)e.DragItems[i];
int dropTIndex = indexOfChild(dropTarget, getParent(dropTarget));
if (getParent(dragItem) != getParent(dropTarget))
{
removeChild(dragItem, getParent(dragItem));
setParent(dragItem, getParent(dropTarget));
insertChild(dragItem, getParent(dragItem), dropTIndex + 1);
}
else
{
int dragTIndex = indexOfChild(dragItem, getParent(dragItem));
if (dropTIndex < dragTIndex)
{
removeChild(dragItem, getParent(dragItem));
insertChild(dragItem, getParent(dragItem), dropTIndex + 1);
}
else
{
removeChild(dragItem, getParent(dragItem));
insertChild(dragItem, getParent(dragItem), dropTIndex);
}
}
}
}
//Put drag items before drop target
else if (e.Action == ItemDropAction.SetPrevSibling)
{
for (int i = 0; i < e.DragItems.Length; ++i)
{
T dragItem = (T)e.DragItems[i];
if (getParent(dragItem) != getParent(dropTarget))
{
removeChild(dragItem, getParent(dragItem));
setParent(dragItem, getParent(dropTarget));
insertChild(dragItem, getParent(dragItem), 0);
}
int dropTIndex = indexOfChild(dropTarget, getParent(dropTarget));
int dragTIndex = indexOfChild(dragItem, getParent(dragItem));
if (dropTIndex > dragTIndex)
{
removeChild(dragItem, getParent(dragItem));
insertChild(dragItem, getParent(dragItem), dropTIndex - 1);
}
else
{
removeChild(dragItem, getParent(dragItem));
insertChild(dragItem, getParent(dragItem), dropTIndex);
}
}
}
}
